I would be interested to know how they established the correct points for the centers of circles and the end points of lines. Is everything referenced from a central axis?

I'm not familiar with the crops and planting methods in Britain. If I must walk through the crop to establish a reference points, is it easy not to accidentally tramp down places that one wishes not to damage?

If new technology is available, why wouldn't the crop circlers use it? Is this like a sport where there are certain informal regulations on what equipment is allowed?

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